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. 2014 Jan 15;7(1):430–440. doi: 10.3390/ma7010430

Figure 3.

Figure 3.

(a) Normalized CL spectra at room temperature for NiO, ZnO and composite nanostructures; (b) Normalized CL spectra for NiO/ZnO heterostructures shown at three different temperatures. Inset shows the effect of temperature on near band gap luminescence.